Large-area, lithography-free, low-cost SERS sensor with good flexibility and high performance

Jing Jiang, Zhida Xu, Abid Ameen, Fei Ding, Guohong Lin, Gang Logan Liu

Research output: Contribution to journalArticle

Abstract

Cost-effective, sensitive and bio-compatible surface-enhanced Raman spectroscopy (SERS) substrate has been in high demand since the Raman spectrum was designated as a significant tool for analyzing the composition of liquids, gases and solids in 1998 [1]. In this research, we presented the design, fabrication and characterization of an improved gold-based SERS substrate. With fine tuning of the SiO2 thickness we achieved a 3.391 times improvement and achieved an enhancement factor of 1.55 ∗ 107 which is 15 times better than the current gold-standard Klarite substrate. Such improvement is ascribed to the localized surface plasmon resonance (SPR) and propagating SPR, which is proved by full-wave finite-difference time-domain simulations.

Original languageEnglish (US)
Article number385205
JournalNanotechnology
Volume27
Issue number38
DOIs
StatePublished - Aug 19 2016

Keywords

  • FDTD simulation
  • localized surface plasmon resonance
  • nano-mushroom
  • surface plasmon resonance
  • surface-enhanced Raman spectroscopy

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Electrical and Electronic Engineering

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